The rate of environmental changes on Earth is

Changes taking place in the environment of earth are measured through the climatic data of decades however the rate of depletion of natural resources with onset of man on earth, hense 1.5 earths are required to sustain the planet.

Explanation:

Various changes and disturbance caused in the earth history and environment that influences natural ecological processes, which not only encompasses physical changes but also the invasion of species and the catastrophic depletion of the environment. Taken as a whole the earth's sustainability over the years has fallen and due to massive growth in population size and driver of change is plate tectonics and volcanism, and solar radiation. Physical evidence can be seen in the form of greenhouse gases and depletion of freshwater resources use of artificial technology in agricultural practices. Some other impacts are ocean acidification, ozone depletion, species extension and rise in global temperatures.